package main

import "fmt"

func main() {
	//第二章：基本变量和类型
	var age int
	age = 18
	fmt.Println("age:", age)

	var age2 int = 20
	fmt.Println("age2:", age2)

	var age3 = 22
	fmt.Println("age3:", age3)

	//var age4 int = 24.1
	//fmt.Println("age4:", age4)
}
